Short version
Starting in 1997 instellar and interplanatary colonization is cheap(ish) and easy (enough) that every nation on Earth wants in on the action. The Galaxy is empty (in terms of other races.) Ships travel relativistic speeds because the cryogenics may start to fail after four years. (1% chance first year, 2% additional chance next, onwards to 50% chance (although 50% may be retrievable indefinatly, or until power fails and the human inside is euthanised; the alternative is scary to contimplate.) Limit 100,000 colonists per ship.
In 1997, it costs 20bn a ship. (Insystem, it's a mere 1bn a ship)
In 2003, it costs 10bn per ship. (Insystem .5bn)
in 2009, it costs 5bn per ship. (Insystem 250mill!)
In 2015. FTL speed is upped to a max of 20c (2.5bn per ship, Insystem 125mill!)
What I want to know is: What nations will send colonists, and what nations would partner to send colonists to other worlds? Who gets what in the Sol system specifically? And how many send colonists to other systems? (Consider each asteroid colony seperate, the the entire Belt, Kuiper Belt, and Oort Clout able to accept a unlimited number of colonization attempts. Secondly, yes the 'prices' have been simplified to make the WI easier to work with.)
(Removed longer backstory because of technical issues. Thanks for poking holes in it. It's plotbonium.
Also requesting move to ASB forum.)